The expanding of the universe has been veryfied in the last 30 years
the so called Stringtheory and over that the M-theory has advanced alot in the last few years!
thought its is all theoretic physics and can not yet be falsifyed weve achieved many big things through quantum mecanics (Laser,gprs,computerchips..)
those theories give the best explanations and comprehending on how our universe works
but there is yet so much more to explore
